Plate Tectonics

The Earth's surface is divided into

• plates of rock

• tectonics

• bowls of rock

• plates of metal

Plate tectonics provides an explanation for the occurrence of

• waves and currents

• heating and cooling

• earthquakes and volcanoes

• seasons

The plates of plate tectonics (the lithosphere) float on

• the liquid outer core

• the solid inner core

• the ocean

• the hot "semi-plastic" asthenosphere

What does the theory of plate tectonics state?

• the earth is made of layers

• the crust is made of rigid rock slabs that move in relation to one another

• the mantle is made up of layers

• the tides are caused by the gravitational pull of the moon

What is a convergent plate boundary?

• a fault where two plates move in opposite directions

• a fault where two plates move past each other

• a volcano

• a fault where two plates collide

What does subduction mean?

• when a less dense plate sinks under a more dense plate

• when a more dense plate sinks under a less dense plate

• when two plates collide and form mountain ranges

• when new rock is created at a mid-ocean ridge

What is a transform plate boundary?

• a fault where two plates move in opposite directions

• a fault where two plates move past each other

• a volcano

• a fault where two plates collide

What is a divergent plate boundary?

• a fault where two plates move in opposite directions

• a fault where two plates move past each other

• a volcano

• a fault where two plates collide

Which type of plate boundary creates new oceanic crust?

• divergent

• convergent

• transform

• none, ocean crust is never created

Along which type of plate boundary are earthquakes common?

• divergent

• convergent

• transform

• plate tectonics